Method of making boiler-stays



S.A.PBATT. v METHOD OF MAKING BOILER STAYS.

Patented'JLn, 22, 1895.

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NI S ATES PATENT OFFICE.

METHOD OF MAKl NG BOILER-STAYS.

SPECIFICATION forming part of Letters Patent No. 532,816, dated January 22, 1895.

Serial No. 490,533. (No specimens.)

To 04% whom it may concern:

Be it known that I, STEPHEN A. PRATT, a citizen of the United States, residing at Detroit, in the county of Wayne, State of Michigan, have invented certain new and useful Improvements in Methods of Making Boiler- Stays; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification. r

This invention relates to new and useful improvements in the art of manufacturing boiler stays, and consists in a certain method as hereinafter fully set forth, the essential features of which are pointed out particularly in the claims.

The object of the invention is to produce a boiler stay from an integral piece of bariron, in such manner as to afford the requisite form and strength, and to obviate the necessity of welding. This object is attained by my improved method as illustrated in the accompanying drawings, in which- Figure 1 is a view of a blank of bar iron showing the first step in the manufacture of. this improved stay. Fig. 2 is a view at right angles to Fig. 1, showing the upset end of the bar split, and by dotted lines the position of the feet when turned outward. Fig. 3 is a side elevation of the completed stay. Fig. 4 is a perspective of Fig. 3.

This stay is designed for use in staying the head of the boiler, and is adapted to extend obliquely from the boiler head to the shell thereof, upon the interior of the boiler, or said stay may be employed in staying opposed parallel plates.

Referring to the letters of reference, A designates the body of the stay, which is formed of either round or rectangular bar-iron of the requisite size. One end of this bar is provided with diverging feet 6 having one or more apertures a therethrough, and the opposite end is provided with the flattened portion (1 having the apertures c.

The method of forming this improved stay is as follows: The bar A of proper length is first upset at one end and flattened to produce the enlarged rectangular end portio'n B. This upset portion is then split through lliS width, as shown at e in Fig. 2, and the divided portions are turned outward in opposite directions to form the diverging flat feet b. These feet as shown in the drawings are not turned squarely outward from the bar, but are bent on an oblique line so that the plane of their face stands on an incline to the body of the stay, clearly shown in Figs. 3 and 4. The opposite end of said bar is then flattened as at d, and said flattened portion bent at an angle to the bar so that its face face of the feet b, as shown in Fig. 3. This flattened portion at and the feet b are then provided with the holes a and 0, respectively, for riveting to the head and shell of the boiler, forming the stayshown in Fig. 4. This mode of forming the stay obviates the welding of one or both of the feet bto the bar, as is commonly practiced and by this process of upsetting the end of the bar to form said feet, the iron is rendered more compact and greater strength is added thereto at a point where the strain is most severe, and when said stay is employed to extend obliquely from the head to the boiler shell, by bending said feet outward so that the plane of their face stands at a right angle to that of the flat portion (1, when said stay is placed in position, the face of the feet I) will lie parallel with the head of the boiler and that of the flat portion d will lie parallel with the boiler shell, enabling it to be securely riveted in place. When desirable the end at may also be upset to add the requisite thickness when flattened, which would perhaps be necessary in the use of round iron.

While I have shown and described this stay as having its feet bent outward on an oblique line to the body of the stay, and the flattened end 01 bent to stand at a right angle to the plane of said feet, for some purposes I bend said feet squarely outward so that they stand at a right angle to the stay, and leave the flattened end cl perfectly straight, as, for instance, in staying adjacent parallel plates.

Having thus fully set forth my invention, what I claim as new, and desire to secure by Letters Patent, is

1, The improvement in the art of manufacturing boiler stays, which consists in upsetshall stand substantially at a right angle to the gral diverging feet, the planes of whose faces stand at an incline to said bar, flattening the opposite end of said bar and bending said 15 flattened portion so that the plane of its face shall stand substantially at a right-angle to the face of said feet.

In testimony whereof I affix my signature in presence of two witnesses.

STEPHEN A. PRATT.

Witnesses:

E. S. WHEELER, B. F. WHEELER. 

